Cart-Mounted High Voltage Surge Generator| XHHV535-4T Model: XHHV535-4T
Designed for: Power Utility Field Service Teams, Cable Fault Location Contractors, Electrical Testing & Commissioning Engineers
Core Value: Integrated cart-type DC impulse high-voltage generator delivering 2550J discharge energy with a 4μF built-in capacitor — purpose-built for cable fault pinpointing and DC withstand voltage testing in field environments where mobility, reliability, and operator safety are non-negotiable.
Who This Equipment Is For
The XHHV535-4T is engineered specifically for professional cable fault location service providers and utility maintenance departments who require a self-contained, mobile high-voltage impulse source that can be deployed directly at the fault site — without the setup complexity of separate transformers, capacitor banks, and control consoles.
1Cable Fault ContractorsPortable cart-mounted design for rapid mobilization between job sites. Single-operator deployment with integrated controls.
2Utility Maintenance TeamsScheduled outage fault location on distribution and transmission cables. Generator-compatible for remote sites.
3Testing & Commissioning EngineersPost-installation DC withstand testing and pre-commissioning verification on newly laid cable circuits.
4Industrial Plant ElectriciansPlant-wide cable diagnostics in refineries, mines, steel mills, and processing facilities with extensive MV cable networks.
Key Specifications
Built-in Capacitor4 μF
Discharge Energy2,550 J
Impulse Voltage Range0–35 kV
Impulse ModeAuto & Manual
Auto Impulse Cycle~7 seconds
Overcurrent Protection10A (low-voltage side)
Integrated Architecture — Five Functions in One Cart
Conventional high-voltage impulse test setups require field interconnection of separate DC power supplies, capacitor banks, discharge sphere gaps, and safety discharge devices — a time-consuming process prone to connection errors and inconsistent performance. The XHHV535-4T eliminates this fragmentation by integrating all five subsystems within a single mobile cart chassis:
| Subsystem |
Integration Benefit |
| DC High-Voltage Power Source |
High-frequency HV technology with miniaturized, high-reliability circuit design — eliminates bulky external transformer modules |
| 4μF Energy Storage Capacitor |
Built-in, pre-wired, and factory-tested — no on-site capacitor bank assembly required |
| Discharge Sphere Assembly |
Precisely gapped and calibrated at factory; ruggedized against transport vibration |
| Automatic Discharge Device |
Integrated safety discharge circuit with timed auto-discharge — protects operators during cable disconnection |
| Fault Tester Sampling Module |
Built-in sampling interface for direct connection to cable fault pre-locator (TDR) and acoustic-magnetic pinpointers |
Three Operating Modes — One Control Panel
Operator-Centric Design: The XHHV535-4T adopts a user-centric control philosophy that mirrors the familiar transformer-and-cabinet workflow experienced utility technicians have used for decades — while delivering the performance advantages of modern solid-state HV technology.
- Automatic Timed Impulse: Programmable ~7-second auto impulse cycle for systematic cable thumping during acoustic pinpointing — frees the operator to walk the cable route with the acoustic receiver while the generator maintains consistent discharge cadence
- Manual Impulse: Arbitrary-timing manual trigger via front-panel control — ideal for verifying acoustic propagation in complex urban trench environments with multiple buried utilities
- DC Withstand Voltage Test: Continuous adjustable DC output for insulation resistance assessment, commissioning tests, and post-repair verification — fully integrated, no external DC test set required
Field-Ready Engineering
- Cart-Mounted Mobility: Rugged wheeled chassis with integrated handle for single-operator transport across paved surfaces, substation gravel, and construction site terrain
- Impulse-Immune Electronics: Circuit design specifically hardened against the electromagnetic and mechanical shock of repeated 2550J impulse discharges — a distinct advantage over repurposed general-purpose HV power supplies
- Intuitive Visual Monitoring: Large analog-style voltmeter and ammeter plus digital status indicators for real-time HV output, capacitor charge state, and protection status
- Generator-Compatible: Operates on standard 220V AC ±10% 50Hz mains or field generator (>2kW) for remote sites without grid power access
- Overcurrent Protection: 10A low-voltage-side circuit breaker with automatic trip — protects both the instrument and the operator in fault conditions
Applications
| Application |
Scenario |
| Cable Fault Pinpointing |
Impulse discharge creates acoustic and electromagnetic signals at the fault point for precise location using acoustic-magnetic receivers |
| DC Withstand Voltage Testing |
Post-installation and post-repair verification of cable insulation integrity per IEC standards |
| Pre-Commissioning Cable Testing |
New cable circuit verification before energization — identifies installation damage, joint defects, and manufacturing flaws |
| Periodic Preventive Maintenance |
Scheduled assessment of aging cable infrastructure to predict remaining service life and prioritize replacement CAPEX |
Safety & Operational Precautions
- Separate ground connections required for HV ground and sampling ground — must not be combined at a single earthing point
- Always discharge HV output completely before disconnecting test leads — use the integrated automatic discharge function
- Press "Stop" or power off immediately if any abnormal condition is observed during testing
- Only qualified high-voltage technicians may operate this equipment — non-professional disassembly voids warranty
- Transport in the supplied protective case; avoid rough handling and mechanical impact to the capacitor and sphere gap assemblies
▎Frequently Asked Questions
Q: How does a high voltage surge generator work in cable fault detection?
The surge generator discharges a high-energy pulse into the faulty cable, creating a controlled high-voltage arc at the fault point. This arc produces both an acoustic signal (loud thumping sound detectable by ground microphones) and an electromagnetic pulse (detectable by an inductive receiver). By combining acoustic and electromagnetic signal arrival times, operators can pinpoint the exact fault location with precision—a technique known as acoustic-magnetic synchronization.
Q: Which voltage range should I select for different cable types?
Voltage selection follows the cable's rated operating voltage as a general guideline. For low-voltage cables (up to 1kV), use the 8kV or 12kV range. For medium-voltage distribution cables (6-15kV), the 16kV range is appropriate. For high-voltage transmission cables (35kV and above), use the 32kV range. Always consult the cable manufacturer's maximum test voltage specifications and ensure all safety clearances are maintained during high-voltage operation.
Q: What safety precautions must be observed during surge generator operation?
High voltage surge generator testing requires strict safety protocols. Always verify the cable is fully de-energized and isolated from all power sources before connection. Establish a minimum 5-meter safety perimeter around the test zone with warning signs. All personnel must wear appropriate PPE including arc-rated clothing, HV insulating gloves, and dielectric overshoes. The integrated safety features—automatic discharge upon power-off, emergency stop, and zero-voltage interlock—provide additional layers of protection but should never replace proper safety procedures.
Q: What is the advantage of multiple energy levels (Joules) on this unit?
Different energy levels serve different diagnostic purposes. Low energy settings (e.g., 864J–1024J) are ideal for initial fault confirmation and locating high-resistance faults where excessive energy could worsen cable damage. Medium energy (1225J–2048J) provides optimal acoustic signal strength for most routine fault pinpointing. High energy (2450J+) is reserved for very long cables, deep burial scenarios, or high-impedance faults that require stronger arc generation to produce a detectable acoustic signature. The three-level selection allows operators to match energy output to field conditions.
Q: What warranty and support is included with this surge generator?
12-month standard warranty against manufacturing defects with lifetime technical support. CE and ISO 9001:2015 certified. Each unit includes the surge generator, HV output cable, ground cable, discharge rod, user manual, and a heavy-duty trolley with locking casters for safe transport. On-site installation, commissioning, and operator safety training are available upon request. Spare parts including discharge gaps, capacitors, and HV diodes are stocked for rapid replacement.
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